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Australia
Forrestania Operation (Flying Fox Mine, Spotted Quoll Mine)

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 Location:
369 km E from Perth, Western Australia, Australia
  Address:
Suite 4, Level 5 South Shore Centre 85 South Perth Esplanade
Perth
Western Australia, Australia
6151
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Fax+61-8-9238-8399
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Nickel
Mining Method
  • Longhole open stoping
  • Avoca
  • Cemented backfill
  • Paste backfill
Production Start...
Mine Life2025
The Forrestania Operation nickel deposit is located 400km east of Perth, Western Australia and includes two underground mines, Flying Fox and Spotted Quoll, and the Cosmic Boy processing facility.

Owners

Source: p. 28
CompanyInterestOwnership
IGO Ltd. 100 % Indirect
On 20 June 2022, IGO Limited acquired 100% of the issued capital of Western Areas Limited. Western Areas was an ASX listed Australian-based mining and exploration company with a portfolio of operating and development stage mines. It owns a 100% interest in the Forrestania Operation (consisting of the Flying Fox and Spotted Quoll underground mines and the Cosmic Boy processing facility) and the Cosmos Project, both located in Western Australia, together with a substantial exploration portfolio.

Contractors

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Deposit Type

  • VMS

Summary:

The Forrestania Greenstone Belt forms the southern extension of the Southern Cross Greenstone Belt, a 400km long arcuate belt of ~2.9Ga greenstone sequences bounded by Archaean granite-gneissic units of the Yilgarn Craton.

The Forrestania Greenstone Belt comprises two main lithological associations; a lower sequence of basalt-ultramaficBanded Iron Formation (BIF) ± metasediments, and an upper sequence of predominately finely laminated siltstones, shales and felsic metasediments. Up to six belts of ultramafic rock-types are recognised in the lower association, and the strike length of individual belts ranges from 20 to 90km. The ultramafic belts comprise komatiite sequences that show a wide variety of volcanic flow facies environments, including thick sequences of olivine adcumulate to mesocumulate hosted nickel deposits (Eastern Ultramafic Belt; hosting the Fireball, Diggers and Cosmic Boy deposits), channelised flow sequences with bounding flanking flow facies (Western Ultramafic Belt; hosting the Flying Fox, Spotted Quoll, New Morning/Daybreak and Willy Willy deposits and prospects), and thin spinifextextured flow units (Eastern Ultramafic Belt; hosting the Hang Dog and Emu Heights prospects). The ultramafic belts have mostly steep dips, some of which are locally overturned such as the Eastern Ultramafic Belt south of the Purple Haze Prospect. Five of the six ultramafic belts face west, with only the western belt facing east. Nickel deposits and occurrences are ........

Mining Methods

  • Longhole open stoping
  • Avoca
  • Cemented backfill
  • Paste backfill

Summary:

Spotted Quoll is an underground mine which is a part of Forestania operation.

The mining method used is predominantly longhole stoping with a top-down sequence and paste filling of resultant voids.

A 3.0 m minimum mining width is used. The average length of stable stopes is between 10m and 30m. The average stope height is between 7m and 15m. Other geotechnical parameters are contained in the current Ground Control Management Plan.

The planned stope dilution is 0.5m (hanging wall) and 0.1–0.2m (footwall). Unplanned dilution (from host rock and paste) is 8.0% in weight at 0% Ni. The standard SG for dilution is 2.8t/m3 . A grade of 0% Ni is assigned to all material outside the block model. Ore recovery is 98%, and metal recovery is 98%. The pillar factor for unplanned pillars is 0%. Production rates reflect current mining performances and practice.

Being an operating mine, all infrastructure (apart from future capital development and external plants) is present and used on site, and allowance for new infrastructure, based on technical studies, is made in the CAPEX of the LOM.

Flying Fox has been an operating underground mine since 2005.

The mining method used is a mix of direct AVOCA, reverse AVOCA longhole stoping with a bottom-up sequence and rock and cemented rock fill above the 425 level, and a longhole top-down sequence and paste filling of resultant voids below the 425 level.

Mining factors a ........

Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits202320222020201920182017
Nickel t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required21,06023,005
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
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Operational Metrics:

Metrics20212020201920182017
Annual production capacity  ......  Subscription required
Annual processing capacity  ......  Subscription required550,000 t550,000 t550,000 t
Ore tonnes mined  ......  Subscription required595,202 t556,002 t607,120 t591,778 t
Tonnes milled  ......  Subscription required586,640 t610,487 t616,598 t617,808 t
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Reserves at June 30, 2023:
Variable Mineral Reserves cut-off grade from 0.8% Ni to 1.0% Ni.

Variable Mineral Resources cut-off grade from 0.40% Ni to 1.0% Ni.

CategoryTonnage CommodityGradeContained Metal
Proven 0.01 Mt Nickel 2.46 % 0.2 kt
Probable 0.4 Mt Nickel 2.97 % 13.1 kt
Proven & Probable 0.5 Mt Nickel 2.96 % 13.4 kt
Measured 0.01 Mt Nickel 2.46 % 0.2 kt
Indicated 2.7 Mt Nickel 2.64 % 72.7 kt
Inferred 0.8 Mt Nickel 3.36 % 26.1 kt
Total Resource 3.5 Mt Nickel 2.8 % 99 kt

Commodity Production Costs:

CommodityUnits20232020201920182017
Credits (by-product) Nickel AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required -0.03 / lb   -0.03 / lb  
Cash costs Nickel AUD  ......  Subscription required  ......  Subscription required 2.63 / lb†   2.38 / lb†  
Total cash costs Nickel AUD  ......  Subscription required
All-in sustaining costs (AISC) Nickel AUD  ......  Subscription required
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units20232020201920182017
Capital expenditures (planned) M AUD  ......  Subscription required
Revenue M AUD  ......  Subscription required  ......  Subscription required 248.3   213.9  
Pre-tax Income M AUD  ......  Subscription required  ......  Subscription required 17.2   17.4  
After-tax Income M AUD  ......  Subscription required  ......  Subscription required 11.8   19.3  
EBIT M AUD  ......  Subscription required  ......  Subscription required 18.5   18.6  
EBITDA M AUD  ......  Subscription required  ......  Subscription required 248.3   84.9  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 25, 2023
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2023
Quarterly Report 2023
Sustainability Report 2023
Year-end Mineral Reserves 2023
Annual Report 2022
Sustainability Report 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Year-end Mineral Reserves 2013
Other 2010
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